Double-layer fin heat exchange tube

Abstract

The utility model relates to the field of fin heat exchange tubes, and discloses a double-layer fin heat exchange tube which comprises a heat exchange outer tube, a heat exchange inner tube is arranged in an inner cavity of the heat exchange outer tube, the heat exchange outer tube and the heat exchange inner tube are connected through a connecting mechanism, first fins are evenly and fixedly connected to the outer ring of the heat exchange outer tube, and second fins are evenly and fixedly connected to the outer ring of the heat exchange outer tube. A limiting ring is arranged between the first fins, a second fin is fixedly connected to the middle position of the outer ring of the limiting ring, and the double-layer fin heat exchange tube drives a second scraper on the second fin on the outer ring of the limiting ring to rotate by 180 degrees in a reciprocating mode by connecting a control panel. In the process, dust and impurities on the first fins are cleaned and scraped through the second scraping plates, meanwhile, when the second fins rotate, relative movement is generated between the second fins and the first scraping plates on the first fins, in other words, the first scraping plates can clean and scrape the impurities and dust on the second fins, the structure is simple, cleaning and scraping are convenient, and the cleaning efficiency is improved. The problem that heat dissipation is affected due to the fact that impurities on the surface of an existing fin heat exchange tube are difficult to clean is solved.

Description

Technical Field

[0001] This utility model relates to the field of finned heat exchanger tube technology, specifically a double-layer finned heat exchanger tube. Background Art

[0002] A finned heat exchanger tube is a heat exchange element that improves heat exchange efficiency by adding fins to the surface of the heat exchange tube. Finned tubes typically have numerous fins machined onto the outer or inner surface of the original tube, thereby expanding the heat transfer area and enhancing the heat exchange effect. The manufacturing process of finned tubes usually involves adding fins to the surface of the original tube using specific processes.

[0003] The patent with publication number CN211626228U discloses a double-finned heat exchange tube, which includes a heat exchange tube body. Multiple inner fins are arranged in a ring along the center line of the heat exchange tube body. Adjacent inner fins are connected and enclosed to form the inner cavity of the heat exchange tube. The outer surface of the inner fins and the inner wall of the heat exchange tube tank form the outer cavity of the heat exchange tube. Corrugated wall surfaces are provided on the inner side of the inner fins at intervals. The heat exchange tube inner cavity flow channel, the heat exchange tube outer cavity flow channel, and the fluid cavity flow channel in this device increase the heat exchange area of ​​the heat exchange tube and improve the heat transfer effect.

[0004] However, this device dissipates heat through inner and outer fins. Due to the presence of inner and outer fins, the outer surface of the heat exchange tube becomes uneven, which easily accumulates dirt, dust and other impurities. Over time, these impurities will affect the heat transfer effect. To address this, a double-finned heat exchange tube is proposed to solve the problem that existing finned heat exchange tubes are difficult to clean of surface impurities, thus affecting heat dissipation. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a double-finned heat exchange tube, which solves the aforementioned problems.

[0007] (2) Technical solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a double-finned heat exchange tube, comprising an outer heat exchange tube, an inner heat exchange tube disposed within the inner cavity of the outer heat exchange tube, the outer heat exchange tube and the inner heat exchange tube being connected by a connecting mechanism, first fins being evenly and fixedly connected to the outer circumference of the outer heat exchange tube, a limiting ring being disposed between the first fins, a second fin being fixedly connected to the middle position of the outer circumference of the limiting ring, a first scraper being fixedly connected to one side of the first fin at a symmetrical position, a second scraper being fixedly connected to both sides of the second fin at a symmetrical position, and a connecting control plate being fixedly connected to the top of the second fin.

[0009] Preferably, the limiting ring is rotatably connected to the outer ring of the heat exchange outer tube, and the limiting ring, the first scraper, and the second scraper are all made of a material with good thermal conductivity.

[0010] Preferably, the included angle between the two first scrapers is 180 degrees, and the included angle between the two second scrapers in the same plane is 180 degrees.

[0011] Preferably, the first scraper and the second fin are in contact but not in pressure, and the first fins on both sides of the limiting ring of the second scraper are in contact but not in pressure.

[0012] Preferably, the connecting mechanism includes multiple slots formed in the inner ring of the heat exchange outer tube and the outer ring of the heat exchange inner tube, and heat sinks are engaged in the inner cavity of the slots.

[0013] Preferably, the outer rings on both sides of the heat exchange inner tube are provided with plug grooves, the inner rings on both sides of the heat exchange outer tube are provided with internal threads, and the inner cavities of the heat exchange outer tube are provided with connecting rings at both ends.

[0014] Preferably, the outer ring of the connecting ring is provided with an external thread, a control ring is fixedly connected to one side of the connecting ring, and the grooves on both sides of the heat exchange inner tube are slightly smaller than the inner diameter of the connecting ring.

[0015] (3) Beneficial effects

[0016] 1. This double-finned heat exchange tube, through the connection control board, drives the second scraper on the second fin of the outer ring of the limiting ring to rotate 180 degrees back and forth. During the process, the second scraper is used to scrape the dust and impurities on the first fin. At the same time, when the second fin rotates, it generates relative motion with the first scraper on the first fin. That is, the first scraper can scrape the impurities and dust on the second fin. The structure is simple and the cleaning is convenient, which solves the problem that existing finned heat exchange tubes are difficult to clean the surface impurities, thus affecting heat dissipation.

[0017] 2. This double-finned heat exchange tube, through the control ring driving the connecting ring to rotate, and then under the action of the internal and external threads, the connecting ring is separated from the heat exchange outer tube. Then the heat exchange inner tube and heat sink can be pulled out from the heat exchange outer tube, so that the heat exchange inner tube and heat sink can be cleaned, inspected or replaced. Conversely, the heat exchange inner tube can be installed into the heat exchange outer tube, and the heat sink in the slot can be used to further improve the heat exchange effect of the heat exchange tube. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present utility model;

[0019] Figure 2 This is a structural diagram of the present utility model;

[0020] Figure 3 This is a schematic diagram of the second fin of the present invention.

[0021] Figure 4 This is a schematic diagram of the first fin of the present invention;

[0022] Figure 5 This is an exploded view of the structure of this utility model.

[0023] In the diagram: 1. Heat exchanger outer tube; 2. Heat exchanger inner tube; 3. Connecting mechanism; 301. Slot; 302. Heat sink fin; 303. Plug groove; 304. Internal thread; 305. Connecting ring; 306. External thread; 307. Control ring; 4. First fin; 5. Limiting ring; 6. Second fin; 7. First scraper; 8. Second scraper; 9. Connecting control board. Detailed Implementation

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example: Please refer to Figure 1-5 A double-finned heat exchange tube includes an outer heat exchange tube 1, an inner heat exchange tube 2 disposed within the inner cavity of the outer heat exchange tube 1, the outer heat exchange tube 1 and the inner heat exchange tube 2 being connected by a connecting mechanism 3, first fins 4 being evenly and fixedly connected to the outer ring of the outer heat exchange tube 1, a limiting ring 5 being disposed between the first fins 4, a second fin 6 being fixedly connected to the middle position of the outer ring of the limiting ring 5, a first scraper 7 being fixedly connected to one side of the first fin 4, a second scraper 8 being fixedly connected to both sides of the second fin 6, and a connecting control plate 9 being fixedly connected to the top of the second fin 6.

[0026] Furthermore, the limiting ring 5 is rotatably connected to the outer ring of the heat exchange outer tube 1. The limiting ring 5, the first scraper 7, and the second scraper 8 are all made of materials with good thermal conductivity.

[0027] Furthermore, the included angle between the two first scrapers 7 is 180 degrees, and the included angle between the two second scrapers 8 in the same plane is 180 degrees.

[0028] Furthermore, the first scraper 7 and the second fin 6 are in contact but not squeezed together, and the first fins 4 on both sides of the limiting ring 5 of the second scraper 8 are in contact but not squeezed together. The second scraper 8 on the second fin 6 on the outer ring of the limiting ring 5 is driven to rotate 180 degrees back and forth through the connecting control plate 9. During the process, the second scraper 8 is used to scrape the dust and impurities on the first fin 4. At the same time, when the second fin 6 rotates, it generates relative motion with the first scraper 7 on the first fin 4. That is, the first scraper 7 can scrape the impurities and dust on the second fin 6. The structure is simple and the cleaning is convenient.

[0029] Furthermore, the connecting mechanism 3 includes multiple slots 301 formed on the inner ring of the heat exchange outer tube 1 and the outer ring of the heat exchange inner tube 2, and heat sinks 302 are engaged in the inner cavity of the slots 301.

[0030] Furthermore, the outer rings on both sides of the heat exchange inner tube 2 are provided with plug grooves 303, the inner rings on both sides of the heat exchange outer tube 1 are provided with internal threads 304, and the inner cavities of the heat exchange outer tube 1 are provided with connecting rings 305.

[0031] Furthermore, the outer ring of the connecting ring 305 is provided with an external thread 306, and a control ring 307 is fixedly connected to one side of the connecting ring 305. The grooves 303 on both sides of the heat exchange inner tube 2 are slightly smaller than the inner diameter of the connecting ring 305. The control ring 307 drives the connecting ring 305 to rotate, and then, under the action of the internal thread 304 and the external thread 306, the connecting ring 305 is separated from the heat exchange outer tube 1. Then the heat exchange inner tube 2 together with the heat sink 302 can be pulled out from the heat exchange outer tube 1, so that the heat exchange inner tube 2 and the heat sink 302 can be cleaned, inspected or replaced. Conversely, the heat exchange inner tube 2 can be installed into the heat exchange outer tube 1, and the heat sink 302 in the slot 301 can be used to further improve the heat exchange effect of the heat exchange tube.

[0032] Working Principle: When using this double-finned heat exchanger tube, after the fluid enters the inner heat exchanger tube 2, the heat contained inside is conducted from the inner heat exchanger tube 2 to the area between it and the outer heat exchanger tube 1. Then, the heat transfer area is increased by the action of the first fin 4, the limiting ring 5, and the second fin 6 on the outer ring of the inner heat exchanger tube 2, thereby improving the heat exchange efficiency. When a lot of impurities or dust accumulates on the first fin 4 and the second fin 6 after a long period of use, the connecting control plate 9 can drive the second scraper 8 on the second fin 6 on the outer ring of the limiting ring 5 to rotate 180 degrees back and forth. During the process, the second scraper 8 is used to scrape the dust and impurities on the first fin 4. At the same time, when the second fin 6 rotates, it interacts with the first scraper 8 on the first fin 4. The plate 7 generates relative motion, meaning the first scraper 7 can scrape away impurities and dust on the second fin 6. The structure is simple and the scraping is convenient, solving the problem that existing finned heat exchange tubes are difficult to clean surface impurities, thus affecting heat dissipation. By controlling the ring 307 to drive the connecting ring 305 to rotate, the connecting ring 305 is separated from the heat exchange outer tube 1 under the action of the internal thread 304 and the external thread 306. Then, the heat exchange inner tube 2 along with the heat sink 302 can be pulled out from the heat exchange outer tube 1, allowing for cleaning, maintenance, or replacement of the heat exchange inner tube 2 and the heat sink 302. Conversely, by installing the heat exchange inner tube 2 into the heat exchange outer tube 1 and utilizing the heat sink 302 in the slot 301, the heat exchange effect of the heat exchange tube can be further improved.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-finned heat exchange tube, comprising an outer heat exchange tube (1), characterized in that: The inner cavity of the heat exchange outer tube (1) is provided with a heat exchange inner tube (2). The heat exchange outer tube (1) and the heat exchange inner tube (2) are connected by a connecting mechanism (3). The outer ring of the heat exchange outer tube (1) is evenly and fixedly connected with first fins (4). A limit ring (5) is provided between the first fins (4). A second fin (6) is fixedly connected at the middle position of the outer ring of the limit ring (5). A first scraper (7) is fixedly connected at a symmetrical position on one side of the first fin (4). A second scraper (8) is fixedly connected at a symmetrical position on both sides of the second fin (6). A connection control plate (9) is fixedly connected at the top of the second fin (6).

2. The double-finned heat exchange tube according to claim 1, characterized in that: The limiting ring (5) is rotatably connected to the outer ring of the heat exchange outer tube (1). The limiting ring (5), the first scraper (7), and the second scraper (8) are all made of materials with good thermal conductivity.

3. A double-finned heat exchange tube according to claim 1, characterized in that: The included angle between the two first scrapers (7) is 180 degrees, and the included angle between the two second scrapers (8) in the same plane is 180 degrees.

4. A double-finned heat exchange tube according to claim 1, characterized in that: The first scraper (7) and the second fin (6) are in contact but not in pressure, and the first fins (4) on both sides of the limiting ring (5) of the second scraper (8) are in contact but not in pressure.

5. A double-finned heat exchange tube according to claim 1, characterized in that: The connecting mechanism (3) includes multiple slots (301) formed in the inner ring of the heat exchange outer tube (1) and the outer ring of the heat exchange inner tube (2), and the inner cavity of the slots (301) is fitted with heat sinks (302).

6. A double-finned heat exchange tube according to claim 1, characterized in that: The heat exchange inner tube (2) has plug grooves (303) on both sides of the outer ring, the heat exchange outer tube (1) has internal threads (304) on both sides of the inner ring, and the heat exchange outer tube (1) has connecting rings (305) at both ends of the inner cavity.

7. A double-finned heat exchange tube according to claim 6, characterized in that: The outer ring of the connecting ring (305) is provided with an external thread (306), and a control ring (307) is fixedly connected to one side of the connecting ring (305). The grooves (303) on both sides of the heat exchange inner tube (2) are slightly smaller than the inner diameter of the connecting ring (305).

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